Cellular Phone - Intermittent Malfunctions

GROUP 84
Phone, Navigation Systems

84 07 01

Woodcliff Lake, NJ
Service Engineering

August 2001

SUBJECT
CPT 8000 Phone with TDMA Cingular Handset - Intermittent Malfunctions

MODEL
All with CPT8000/TDMA Cingular Digital Phone

SITUATION

Customers may complain of the following, intermittent malfunctions of the phone system:

-- Hands free operation is inoperative

-- Phone does not receive calls

-- Phone ringer does not work

-- Phone drops calls.

CAUSE

TCU software error, causing incorrect processing of the phone message sequence when switching from digital to analog network.

CORRECTION

The improved TCU unit is under development.

In the meantime, on a customer complaint basis only: remove ICU and send by FedEx with a copy of the repair order and return address to:

Product Development, Attn: FA

BMW of North America
1 BMW Plaza
Montvale, NJ 07645

The TCU will be reprogrammed and returned on the day of receipt.